[Zope] export of modified ZClass fails

[Dieter Maurer]

Dennis Allison writes:
 > I modified ZDiscussions significantly and it works fine. It's a ZClass
 > with Python base classes.   I want to export it to another Zope instance.
 > So I simply exported it from the Control_Panel/Products menu in the ZMI.
 > Export worked fine but when I import it in the new system, I get a 
 > diagnostic 
 > 
 >   Failed to import class _ZClass_for_ZDTopic from module Products.ZDBase
 > 
 > Products.ZDBase defines the ZDisscussions base classes.  It was installed
 > successfully in a separate, independent import.
Did you restart Zope after you have installed the ZDBase product
(and before you imported the zexp)?


Dieter